Ulrich Eckhardt: changes to c_client.py, posted on the mailing listulrich_eckhardt

1 files changed, 1005 insertions, 1043 deletions

diff --git a/src/c_client.py b/src/c_client.py
index 4f3b089..d412ed8 100755
--- a/src/c_client.py
+++ b/src/c_client.py
@@ -1,1043 +1,1005 @@
-#!/usr/bin/env python
-from xml.etree.cElementTree import *
-from os.path import basename
-import getopt
-import sys
-import re
-
-# Jump to the bottom of this file for the main routine
-
-# Some hacks to make the API more readable, and to keep backwards compability
-_cname_re = re.compile('([A-Z0-9][a-z]+|[A-Z0-9]+(?![a-z])|[a-z]+)')
-_cname_special_cases = {'DECnet':'decnet'}
-
-_extension_special_cases = ['XPrint', 'XCMisc', 'BigRequests']
-
-_cplusplus_annoyances = {'class' : '_class',
-                         'new'   : '_new',
-                         'delete': '_delete'}
-
-_hlines = []
-_hlevel = 0
-_clines = []
-_clevel = 0
-_ns = None
-
-def _h(fmt, *args):
-    '''
-    Writes the given line to the header file.
-    '''
-    _hlines[_hlevel].append(fmt % args)
-    
-def _c(fmt, *args):
-    '''
-    Writes the given line to the source file.
-    '''
-    _clines[_clevel].append(fmt % args)
-    
-def _hc(fmt, *args):
-    '''
-    Writes the given line to both the header and source files.
-    '''
-    _h(fmt, *args)
-    _c(fmt, *args)
-
-# XXX See if this level thing is really necessary.
-def _h_setlevel(idx):
-    '''
-    Changes the array that header lines are written to.
-    Supports writing different sections of the header file.
-    '''
-    global _hlevel
-    while len(_hlines) <= idx:
-        _hlines.append([])
-    _hlevel = idx
-    
-def _c_setlevel(idx):
-    '''
-    Changes the array that source lines are written to.
-    Supports writing to different sections of the source file.
-    '''
-    global _clevel
-    while len(_clines) <= idx:
-        _clines.append([])
-    _clevel = idx
-    
-def _n_item(str):
-    '''
-    Does C-name conversion on a single string fragment.
-    Uses a regexp with some hard-coded special cases.
-    '''
-    if str in _cname_special_cases:
-        return _cname_special_cases[str]
-    else:
-        split = _cname_re.finditer(str)
-        name_parts = [match.group(0) for match in split]
-        return '_'.join(name_parts)
-    
-def _cpp(str):
-    '''
-    Checks for certain C++ reserved words and fixes them.
-    '''
-    if str in _cplusplus_annoyances:
-        return _cplusplus_annoyances[str]
-    else:
-        return str
-
-def _ext(str):
-    '''
-    Does C-name conversion on an extension name.
-    Has some additional special cases on top of _n_item.
-    '''
-    if str in _extension_special_cases:
-        return _n_item(str).lower()
-    else:
-        return str.lower()
-    
-def _n(list):
-    '''
-    Does C-name conversion on a tuple of strings.
-    Different behavior depending on length of tuple, extension/not extension, etc.
-    Basically C-name converts the individual pieces, then joins with underscores.
-    '''
-    if len(list) == 1:
-        parts = list
-    elif len(list) == 2:
-        parts = [list[0], _n_item(list[1])]
-    elif _ns.is_ext:
-        parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]]
-    else:
-        parts = [list[0]] + [_n_item(i) for i in list[1:]]
-    return '_'.join(parts).lower()
-
-def _t(list):
-    '''
-    Does C-name conversion on a tuple of strings representing a type.
-    Same as _n but adds a "_t" on the end.
-    '''
-    if len(list) == 1:
-        parts = list
-    elif len(list) == 2:
-        parts = [list[0], _n_item(list[1]), 't']
-    elif _ns.is_ext:
-        parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]] + ['t']
-    else:
-        parts = [list[0]] + [_n_item(i) for i in list[1:]] + ['t']
-    return '_'.join(parts).lower()
-        
-
-def c_open(self):
-    '''
-    Exported function that handles module open.
-    Opens the files and writes out the auto-generated comment, header file includes, etc.
-    '''
-    global _ns
-    _ns = self.namespace
-    _ns.c_ext_global_name = _n(_ns.prefix + ('id',))
-
-    # Build the type-name collision avoidance table used by c_enum
-    build_collision_table()
-
-    _h_setlevel(0)
-    _c_setlevel(0)
-
-    _hc('/*')
-    _hc(' * This file generated automatically from %s by c_client.py.', _ns.file)
-    _hc(' * Edit at your peril.')
-    _hc(' */')
-    _hc('')
-
-    _h('/**')
-    _h(' * @defgroup XCB_%s_API XCB %s API', _ns.ext_name, _ns.ext_name)
-    _h(' * @brief %s XCB Protocol Implementation.', _ns.ext_name)
-    _h(' * @{')
-    _h(' **/')
-    _h('')
-    _h('#ifndef __%s_H', _ns.header.upper())
-    _h('#define __%s_H', _ns.header.upper())
-    _h('')
-    _h('#include "xcb.h"')
-
-    _c('#include <string.h>')
-    _c('#include <assert.h>')
-    _c('#include "xcbext.h"')
-    _c('#include "%s.h"', _ns.header)
-        
-    if _ns.is_ext:
-        for (n, h) in self.imports:
-            _hc('#include "%s.h"', h)
-
-    _h('')
-    _h('#ifdef __cplusplus')
-    _h('extern "C" {')
-    _h('#endif')
-
-    if _ns.is_ext:
-        _h('')
-        _h('#define XCB_%s_MAJOR_VERSION %s', _ns.ext_name.upper(), _ns.major_version)
-        _h('#define XCB_%s_MINOR_VERSION %s', _ns.ext_name.upper(), _ns.minor_version)
-        _h('  ') #XXX
-        _h('extern xcb_extension_t %s;', _ns.c_ext_global_name)
-
-        _c('')
-        _c('xcb_extension_t %s = { "%s", 0 };', _ns.c_ext_global_name, _ns.ext_xname)
-
-def c_close(self):
-    '''
-    Exported function that handles module close.
-    Writes out all the stored content lines, then closes the files.
-    '''
-    _h_setlevel(2)
-    _c_setlevel(2)
-    _hc('')
-
-    _h('')
-    _h('#ifdef __cplusplus')
-    _h('}')
-    _h('#endif')
-
-    _h('')
-    _h('#endif')
-    _h('')
-    _h('/**')
-    _h(' * @}')
-    _h(' */')
-
-    # Write header file
-    hfile = open('%s.h' % _ns.header, 'w')
-    for list in _hlines:
-        for line in list:
-            hfile.write(line)
-            hfile.write('\n')
-    hfile.close()
-
-    # Write source file
-    cfile = open('%s.c' % _ns.header, 'w')
-    for list in _clines:
-        for line in list:
-            cfile.write(line)
-            cfile.write('\n')
-    cfile.close()
-
-def build_collision_table():
-    global namecount
-    namecount = {}
-
-    for v in module.types.values():
-        name = _t(v[0])
-        namecount[name] = (namecount.get(name) or 0) + 1
-
-def c_enum(self, name):
-    '''
-    Exported function that handles enum declarations.
-    '''
-
-    tname = _t(name)
-    if namecount[tname] > 1:
-        tname = _t(name + ('enum',))
-
-    _h_setlevel(0)
-    _h('')
-    _h('typedef enum %s {', tname)
-
-    count = len(self.values)
-
-    for (enam, eval) in self.values:
-        count = count - 1
-        equals = ' = ' if eval != '' else ''
-        comma = ',' if count > 0 else ''
-        _h('    %s%s%s%s', _n(name + (enam,)).upper(), equals, eval, comma)
-
-    _h('} %s;', tname)
-
-def _c_type_setup(self, name, postfix):
-    '''
-    Sets up all the C-related state by adding additional data fields to
-    all Field and Type objects.  Here is where we figure out most of our
-    variable and function names.
-
-    Recurses into child fields and list member types.
-    '''
-    # Do all the various names in advance
-    self.c_type = _t(name + postfix)
-    self.c_wiretype = 'char' if self.c_type == 'void' else self.c_type
-
-    self.c_iterator_type = _t(name + ('iterator',))
-    self.c_next_name = _n(name + ('next',))
-    self.c_end_name = _n(name + ('end',))
-
-    self.c_request_name = _n(name)
-    self.c_checked_name = _n(name + ('checked',))
-    self.c_unchecked_name = _n(name + ('unchecked',))
-    self.c_reply_name = _n(name + ('reply',))
-    self.c_reply_type = _t(name + ('reply',))
-    self.c_cookie_type = _t(name + ('cookie',))
-
-    if self.is_container:
-
-        self.c_container = 'union' if self.is_union else 'struct'
-        prev_varsized_field = None
-        prev_varsized_offset = 0
-        first_field_after_varsized = None
-
-        for field in self.fields:
-            _c_type_setup(field.type, field.field_type, ())
-            if field.type.is_list:
-                _c_type_setup(field.type.member, field.field_type, ())
-
-            field.c_field_type = _t(field.field_type)
-            field.c_field_const_type = ('' if field.type.nmemb == 1 else 'const ') + field.c_field_type
-            field.c_field_name = _cpp(field.field_name)
-            field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''
-            field.c_pointer = ' ' if field.type.nmemb == 1 else '*'
-
-            field.c_iterator_type = _t(field.field_type + ('iterator',))      # xcb_fieldtype_iterator_t
-            field.c_iterator_name = _n(name + (field.field_name, 'iterator')) # xcb_container_field_iterator
-            field.c_accessor_name = _n(name + (field.field_name,))            # xcb_container_field
-            field.c_length_name = _n(name + (field.field_name, 'length'))     # xcb_container_field_length
-            field.c_end_name = _n(name + (field.field_name, 'end'))           # xcb_container_field_end
-
-            field.prev_varsized_field = prev_varsized_field
-            field.prev_varsized_offset = prev_varsized_offset
-
-            if prev_varsized_offset == 0:
-                first_field_after_varsized = field
-            field.first_field_after_varsized = first_field_after_varsized
-
-            if field.type.fixed_size():
-                prev_varsized_offset += field.type.size
-            else:
-                self.last_varsized_field = field
-                prev_varsized_field = field
-                prev_varsized_offset = 0
-
-def _c_iterator_get_end(field, accum):
-    '''
-    Figures out what C code is needed to find the end of a variable-length structure field.
-    For nested structures, recurses into its last variable-sized field.
-    For lists, calls the end function
-    '''
-    if field.type.is_container:
-        accum = field.c_accessor_name + '(' + accum + ')'
-        # XXX there could be fixed-length fields at the end
-        return _c_iterator_get_end(field.type.last_varsized_field, accum)
-    if field.type.is_list:
-        # XXX we can always use the first way
-        if field.type.member.is_simple:
-            return field.c_end_name + '(' + accum + ')'
-        else:
-            return field.type.member.c_end_name + '(' + field.c_iterator_name + '(' + accum + '))'
-
-def _c_iterator(self, name):
-    '''
-    Declares the iterator structure and next/end functions for a given type.
-    '''
-    _h_setlevel(0)
-    _h('')
-    _h('/**')
-    _h(' * @brief %s', self.c_iterator_type)
-    _h(' **/')
-    _h('typedef struct %s {', self.c_iterator_type)
-    _h('    %s *data; /**<  */', self.c_type)
-    _h('    int%s rem; /**<  */', ' ' * (len(self.c_type) - 2))
-    _h('    int%s index; /**<  */', ' ' * (len(self.c_type) - 2))
-    _h('} %s;', self.c_iterator_type)
-
-    _h_setlevel(1)
-    _c_setlevel(1)
-    _h('')
-    _h('/**')
-    _h(' * Get the next element of the iterator')
-    _h(' * @param i Pointer to a %s', self.c_iterator_type)
-    _h(' *')
-    _h(' * Get the next element in the iterator. The member rem is')
-    _h(' * decreased by one. The member data points to the next')
-    _h(' * element. The member index is increased by sizeof(%s)', self.c_type)
-    _h(' */')
-    _c('')
-    _hc('')
-    _hc('/*****************************************************************************')
-    _hc(' **')
-    _hc(' ** void %s', self.c_next_name)
-    _hc(' ** ')
-    _hc(' ** @param %s *i', self.c_iterator_type)
-    _hc(' ** @returns void')
-    _hc(' **')
-    _hc(' *****************************************************************************/')
-    _hc(' ')
-    _hc('void')
-    _h('%s (%s *i  /**< */);', self.c_next_name, self.c_iterator_type)
-    _c('%s (%s *i  /**< */)', self.c_next_name, self.c_iterator_type)
-    _c('{')
-
-    if not self.fixed_size():
-        _c('    %s *R = i->data;', self.c_type)
-        _c('    xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))
-        _c('    --i->rem;')
-        _c('    i->data = (%s *) child.data;', self.c_type)
-        _c('    i->index = child.index;')
-    else:
-        _c('    --i->rem;')
-        _c('    ++i->data;')
-        _c('    i->index += sizeof(%s);', self.c_type)
-
-    _c('}')
-
-    _h('')
-    _h('/**')
-    _h(' * Return the iterator pointing to the last element')
-    _h(' * @param i An %s', self.c_iterator_type)
-    _h(' * @return  The iterator pointing to the last element')
-    _h(' *')
-    _h(' * Set the current element in the iterator to the last element.')
-    _h(' * The member rem is set to 0. The member data points to the')
-    _h(' * last element.')
-    _h(' */')
-    _c('')
-    _hc('')
-    _hc('/*****************************************************************************')
-    _hc(' **')
-    _hc(' ** xcb_generic_iterator_t %s', self.c_end_name)
-    _hc(' ** ')
-    _hc(' ** @param %s i', self.c_iterator_type)
-    _hc(' ** @returns xcb_generic_iterator_t')
-    _hc(' **')
-    _hc(' *****************************************************************************/')
-    _hc(' ')
-    _hc('xcb_generic_iterator_t')
-    _h('%s (%s i  /**< */);', self.c_end_name, self.c_iterator_type)
-    _c('%s (%s i  /**< */)', self.c_end_name, self.c_iterator_type)
-    _c('{')
-    _c('    xcb_generic_iterator_t ret;')
-
-    if self.fixed_size():
-        _c('    ret.data = i.data + i.rem;')
-        _c('    ret.index = i.index + ((char *) ret.data - (char *) i.data);')
-        _c('    ret.rem = 0;')
-    else:
-        _c('    while(i.rem > 0)')
-        _c('        %s(&i);', self.c_next_name)
-        _c('    ret.data = i.data;')
-        _c('    ret.rem = i.rem;')
-        _c('    ret.index = i.index;')
-
-    _c('    return ret;')
-    _c('}')
-
-def _c_accessor_get_length(expr, prefix=''):
-    '''
-    Figures out what C code is needed to get a length field.
-    For fields that follow a variable-length field, use the accessor.
-    Otherwise, just reference the structure field directly.
-    '''
-    prefarrow = '' if prefix == '' else prefix + '->'
-
-    if expr.lenfield != None and expr.lenfield.prev_varsized_field != None:
-        return expr.lenfield.c_accessor_name + '(' + prefix + ')'
-    elif expr.lenfield_name != None:
-        return prefarrow + expr.lenfield_name
-    else:
-        return str(expr.nmemb)
-
-def _c_accessor_get_expr(expr, prefix=''):
-    '''
-    Figures out what C code is needed to get the length of a list field.
-    Recurses for math operations.
-    Returns bitcount for value-mask fields.
-    Otherwise, uses the value of the length field.
-    '''
-    lenexp = _c_accessor_get_length(expr, prefix)
-
-    if expr.op == '~':
-        return '(' + '~' + _c_accessor_get_expr(expr.rhs, prefix) + ')'
-    elif expr.op != None:
-        return '(' + _c_accessor_get_expr(expr.lhs, prefix) + ' ' + expr.op + ' ' + _c_accessor_get_expr(expr.rhs, prefix) + ')'
-    elif expr.bitfield:
-        return 'xcb_popcount(' + lenexp + ')'
-    else:
-        return lenexp
-
-def _c_accessors_field(self, field):
-    '''
-    Declares the accessor functions for a non-list field that follows a variable-length field.
-    '''
-    if field.type.is_simple:
-        _hc('')
-        _hc('')
-        _hc('/*****************************************************************************')
-        _hc(' **')
-        _hc(' ** %s %s', field.c_field_type, field.c_accessor_name)
-        _hc(' ** ')
-        _hc(' ** @param const %s *R', self.c_type)
-        _hc(' ** @returns %s', field.c_field_type)
-        _hc(' **')
-        _hc(' *****************************************************************************/')
-        _hc(' ')
-        _hc('%s', field.c_field_type)
-        _h('%s (const %s *R  /**< */);', field.c_accessor_name, self.c_type)
-        _c('%s (const %s *R  /**< */)', field.c_accessor_name, self.c_type)
-        _c('{')
-        _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
-        _c('    return * (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)
-        _c('}')
-    else:
-        _hc('')
-        _hc('')
-        _hc('/*****************************************************************************')
-        _hc(' **')
-        _hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
-        _hc(' ** ')
-        _hc(' ** @param const %s *R', self.c_type)
-        _hc(' ** @returns %s *', field.c_field_type)
-        _hc(' **')
-        _hc(' *****************************************************************************/')
-        _hc(' ')
-        _hc('%s *', field.c_field_type)
-        _h('%s (const %s *R  /**< */);', field.c_accessor_name, self.c_type)
-        _c('%s (const %s *R  /**< */)', field.c_accessor_name, self.c_type)
-        _c('{')
-        _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
-        _c('    return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)
-        _c('}')
-    
-def _c_accessors_list(self, field):
-    '''
-    Declares the accessor functions for a list field.
-    Declares a direct-accessor function only if the list members are fixed size.
-    Declares length and get-iterator functions always.
-    '''
-    list = field.type
-
-    _h_setlevel(1)
-    _c_setlevel(1)
-    if list.member.fixed_size():
-        _hc('')
-        _hc('')
-        _hc('/*****************************************************************************')
-        _hc(' **')
-        _hc(' ** %s * %s', field.c_field_type, field.c_accessor_name)
-        _hc(' ** ')
-        _hc(' ** @param const %s *R', self.c_type)
-        _hc(' ** @returns %s *', field.c_field_type)
-        _hc(' **')
-        _hc(' *****************************************************************************/')
-        _hc(' ')
-        _hc('%s *', field.c_field_type)
-        _h('%s (const %s *R  /**< */);', field.c_accessor_name, self.c_type)
-        _c('%s (const %s *R  /**< */)', field.c_accessor_name, self.c_type)
-        _c('{')
-
-        if field.prev_varsized_field == None:
-            _c('    return (%s *) (R + 1);', field.c_field_type)
-        else:
-            _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
-            _c('    return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)
-
-        _c('}')
-
-    _hc('')
-    _hc('')
-    _hc('/*****************************************************************************')
-    _hc(' **')
-    _hc(' ** int %s', field.c_length_name)
-    _hc(' ** ')
-    _hc(' ** @param const %s *R', self.c_type)
-    _hc(' ** @returns int')
-    _hc(' **')
-    _hc(' *****************************************************************************/')
-    _hc(' ')
-    _hc('int')
-    _h('%s (const %s *R  /**< */);', field.c_length_name, self.c_type)
-    _c('%s (const %s *R  /**< */)', field.c_length_name, self.c_type)
-    _c('{')
-    _c('    return %s;', _c_accessor_get_expr(field.type.expr, 'R'))
-    _c('}')
-
-    if field.type.member.is_simple:
-        _hc('')
-        _hc('')
-        _hc('/*****************************************************************************')
-        _hc(' **')
-        _hc(' ** xcb_generic_iterator_t %s', field.c_end_name)
-        _hc(' ** ')
-        _hc(' ** @param const %s *R', self.c_type)
-        _hc(' ** @returns xcb_generic_iterator_t')
-        _hc(' **')
-        _hc(' *****************************************************************************/')
-        _hc(' ')
-        _hc('xcb_generic_iterator_t')
-        _h('%s (const %s *R  /**< */);', field.c_end_name, self.c_type)
-        _c('%s (const %s *R  /**< */)', field.c_end_name, self.c_type)
-        _c('{')
-        _c('    xcb_generic_iterator_t i;')
-
-        if field.prev_varsized_field == None:
-            _c('    i.data = ((%s *) (R + 1)) + (%s);', field.type.c_wiretype, _c_accessor_get_expr(field.type.expr, 'R'))
-        else:
-            _c('    xcb_generic_iterator_t child = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
-            _c('    i.data = ((%s *) child.data) + (%s);', field.type.c_wiretype, _c_accessor_get_expr(field.type.expr, 'R'))
-
-        _c('    i.rem = 0;')
-        _c('    i.index = (char *) i.data - (char *) R;')
-        _c('    return i;')
-        _c('}')
-
-    else:
-        _hc('')
-        _hc('')
-        _hc('/*****************************************************************************')
-        _hc(' **')
-        _hc(' ** %s %s', field.c_iterator_type, field.c_iterator_name)
-        _hc(' ** ')
-        _hc(' ** @param const %s *R', self.c_type)
-        _hc(' ** @returns %s', field.c_iterator_type)
-        _hc(' **')
-        _hc(' *****************************************************************************/')
-        _hc(' ')
-        _hc('%s', field.c_iterator_type)
-        _h('%s (const %s *R  /**< */);', field.c_iterator_name, self.c_type)
-        _c('%s (const %s *R  /**< */)', field.c_iterator_name, self.c_type)
-        _c('{')
-        _c('    %s i;', field.c_iterator_type)
-
-        if field.prev_varsized_field == None:
-            _c('    i.data = (%s *) (R + 1);', field.c_field_type)
-        else:
-            _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))
-            _c('    i.data = (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index));', field.c_field_type, field.c_field_type)
-
-        _c('    i.rem = %s;', _c_accessor_get_expr(field.type.expr, 'R'))
-        _c('    i.index = (char *) i.data - (char *) R;')
-        _c('    return i;')
-        _c('}')
-
-def _c_accessors(self, name, base):
-    '''
-    Declares the accessor functions for the fields of a structure.
-    '''
-    for field in self.fields:
-        if field.type.is_list and not field.type.fixed_size():
-            _c_accessors_list(self, field)
-        elif field.prev_varsized_field != None:
-            _c_accessors_field(self, field)
-
-def c_simple(self, name):
-    '''
-    Exported function that handles cardinal type declarations.
-    These are types which are typedef'd to one of the CARDx's, char, float, etc.
-    '''
-    _c_type_setup(self, name, ())
-
-    if (self.name != name):
-        # Typedef
-        _h_setlevel(0)
-        my_name = _t(name)
-        _h('')
-        _h('typedef %s %s;', _t(self.name), my_name)
-
-        # Iterator
-        _c_iterator(self, name)
-
-def _c_complex(self):
-    '''
-    Helper function for handling all structure types.
-    Called for all structs, requests, replies, events, errors.
-    '''
-    _h_setlevel(0)
-    _h('')
-    _h('/**')
-    _h(' * @brief %s', self.c_type)
-    _h(' **/')
-    _h('typedef %s %s {', self.c_container, self.c_type)
-
-    struct_fields = []
-    maxtypelen = 0
-
-    varfield = None
-    for field in self.fields:
-        if not field.type.fixed_size():
-            varfield = field.c_field_name
-            continue
-        if varfield != None and not field.type.is_pad and field.wire:
-            errmsg = '%s: warning: variable field %s followed by fixed field %s\n' % (self.c_type, varfield, field.c_field_name)
-            sys.stderr.write(errmsg)
-            # sys.exit(1)
-        if field.wire:
-            struct_fields.append(field)
-        
-    for field in struct_fields:
-        if len(field.c_field_type) > maxtypelen:
-            maxtypelen = len(field.c_field_type)
-
-    for field in struct_fields:
-        spacing = ' ' * (maxtypelen - len(field.c_field_type))
-        _h('    %s%s %s%s; /**<  */', field.c_field_type, spacing, field.c_field_name, field.c_subscript)
-
-    _h('} %s;', self.c_type)
-
-def c_struct(self, name):
-    '''
-    Exported function that handles structure declarations.
-    '''
-    _c_type_setup(self, name, ())
-    _c_complex(self)
-    _c_accessors(self, name, name)
-    _c_iterator(self, name)
-
-def c_union(self, name):
-    '''
-    Exported function that handles union declarations.
-    '''
-    _c_type_setup(self, name, ())
-    _c_complex(self)
-    _c_iterator(self, name)
-
-def _c_request_helper(self, name, cookie_type, void, regular):
-    '''
-    Declares a request function.
-    '''
-
-    # Four stunningly confusing possibilities here:
-    #
-    #   Void            Non-void
-    # ------------------------------
-    # "req"            "req"
-    # 0 flag           CHECKED flag   Normal Mode
-    # void_cookie      req_cookie
-    # ------------------------------
-    # "req_checked"    "req_unchecked"
-    # CHECKED flag     0 flag         Abnormal Mode
-    # void_cookie      req_cookie
-    # ------------------------------
-
-
-    # Whether we are _checked or _unchecked
-    checked = void and not regular
-    unchecked = not void and not regular
-
-    # What kind of cookie we return
-    func_cookie = 'xcb_void_cookie_t' if void else self.c_cookie_type
-
-    # What flag is passed to xcb_request
-    func_flags = '0' if (void and regular) or (not void and not regular) else 'XCB_REQUEST_CHECKED'
-
-    # Global extension id variable or NULL for xproto
-    func_ext_global = '&' + _ns.c_ext_global_name if _ns.is_ext else '0'
-
-    # What our function name is
-    func_name = self.c_request_name
-    if checked:
-        func_name = self.c_checked_name
-    if unchecked:
-        func_name = self.c_unchecked_name
-
-    param_fields = []
-    wire_fields = []
-    maxtypelen = len('xcb_connection_t')
-
-    for field in self.fields:
-        if field.visible:
-            # The field should appear as a call parameter
-            param_fields.append(field)
-        if field.wire and not field.auto:
-            # We need to set the field up in the structure
-            wire_fields.append(field)
-        
-    for field in param_fields:
-        if len(field.c_field_const_type) > maxtypelen:
-            maxtypelen = len(field.c_field_const_type)
-
-    _h_setlevel(1)
-    _c_setlevel(1)
-    _h('')
-    _h('/**')
-    _h(' * Delivers a request to the X server')
-    _h(' * @param c The connection')
-    _h(' * @return A cookie')
-    _h(' *')
-    _h(' * Delivers a request to the X server.')
-    _h(' * ')
-    if checked:
-        _h(' * This form can be used only if the request will not cause')
-        _h(' * a reply to be generated. Any returned error will be')
-        _h(' * saved for handling by xcb_request_check().')
-    if unchecked:
-        _h(' * This form can be used only if the request will cause')
-        _h(' * a reply to be generated. Any returned error will be')
-        _h(' * placed in the event queue.')
-    _h(' */')
-    _c('')
-    _hc('')
-    _hc('/*****************************************************************************')
-    _hc(' **')
-    _hc(' ** %s %s', cookie_type, func_name)
-    _hc(' ** ')
-
-    spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
-    _hc(' ** @param xcb_connection_t%s *c', spacing)
-
-    for field in param_fields:
-        spacing = ' ' * (maxtypelen - len(field.c_field_const_type))
-        _hc(' ** @param %s%s %s%s', field.c_field_const_type, spacing, field.c_pointer, field.c_field_name)
-
-    _hc(' ** @returns %s', cookie_type)
-    _hc(' **')
-    _hc(' *****************************************************************************/')
-    _hc(' ')
-    _hc('%s', cookie_type)
-
-    spacing = ' ' * (maxtypelen - len('xcb_connection_t'))
-    comma = ',' if len(param_fields) else ');'
-    _h('%s (xcb_connection_t%s *c  /**< */%s', func_name, spacing, comma)
-    comma = ',' if len(param_fields) else ')'
-    _c('%s (xcb_connection_t%s *c  /**< */%s', func_name, spacing, comma)
-
-    func_spacing = ' ' * (len(func_name) + 2)
-    count = len(param_fields)
-    for field in param_fields:
-        count = count - 1
-        spacing = ' ' * (maxtypelen - len(field.c_field_const_type))
-        comma = ',' if count else ');'
-        _h('%s%s%s %s%s  /**< */%s', func_spacing, field.c_field_const_type, spacing, field.c_pointer, field.c_field_name, comma)
-        comma = ',' if count else ')'
-        _c('%s%s%s %s%s  /**< */%s', func_spacing, field.c_field_const_type, spacing, field.c_pointer, field.c_field_name, comma)
-
-    count = 2
-    for field in param_fields:
-        if not field.type.fixed_size():
-            count = count + 2
-
-    _c('{')
-    _c('    static const xcb_protocol_request_t xcb_req = {')
-    _c('        /* count */ %d,', count)
-    _c('        /* ext */ %s,', func_ext_global)
-    _c('        /* opcode */ %s,', self.c_request_name.upper())
-    _c('        /* isvoid */ %d', 1 if void else 0)
-    _c('    };')
-    _c('    ')
-    _c('    struct iovec xcb_parts[%d];', count + 2)
-    _c('    %s xcb_ret;', func_cookie)
-    _c('    %s xcb_out;', self.c_type)
-    _c('    ')
-
-    for field in wire_fields:
-        if field.type.fixed_size():
-            if field.type.is_expr:
-                _c('    xcb_out.%s = %s;', field.c_field_name, _c_accessor_get_expr(field.type.expr))
-
-            elif field.type.is_pad:
-                if field.type.nmemb == 1:
-                    _c('    xcb_out.%s = 0;', field.c_field_name)
-                else:
-                    _c('    memset(xcb_out.%s, 0, %d);', field.c_field_name, field.type.nmemb)
-            else:
-                if field.type.nmemb == 1:
-                    _c('    xcb_out.%s = %s;', field.c_field_name, field.c_field_name)
-                else:
-                    _c('    memcpy(xcb_out.%s, %s, %d);', field.c_field_name, field.c_field_name, field.type.nmemb)
-
-    _c('    ')
-    _c('    xcb_parts[2].iov_base = (char *) &xcb_out;')
-    _c('    xcb_parts[2].iov_len = sizeof(xcb_out);')
-    _c('    xcb_parts[3].iov_base = 0;')
-    _c('    xcb_parts[3].iov_len = -xcb_parts[2].iov_len & 3;')
-
-    count = 4
-    for field in param_fields:
-        if not field.type.fixed_size():
-            _c('    xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
-            if field.type.is_list:
-                _c('    xcb_parts[%d].iov_len = %s * sizeof(%s);', count, _c_accessor_get_expr(field.type.expr), field.type.member.c_wiretype)
-            else:
-                _c('    xcb_parts[%d].iov_len = %s * sizeof(%s);', count, 'Uh oh', field.type.c_wiretype)
-            _c('    xcb_parts[%d].iov_base = 0;', count + 1)
-            _c('    xcb_parts[%d].iov_len = -xcb_parts[%d].iov_len & 3;', count + 1, count)
-            count = count + 2
-
-    _c('    xcb_ret.sequence = xcb_send_request(c, %s, xcb_parts + 2, &xcb_req);', func_flags)
-    _c('    return xcb_ret;')
-    _c('}')
-
-def _c_reply(self, name):
-    '''
-    Declares the function that returns the reply structure.
-    '''
-    spacing1 = ' ' * (len(self.c_cookie_type) - len('xcb_connection_t'))
-    spacing2 = ' ' * (len(self.c_cookie_type) - len('xcb_generic_error_t'))
-    spacing3 = ' ' * (len(self.c_reply_name) + 2)
-
-    _h('')
-    _h('/**')
-    _h(' * Return the reply')
-    _h(' * @param c      The connection')
-    _h(' * @param cookie The cookie')
-    _h(' * @param e      The xcb_generic_error_t supplied')
-    _h(' *')
-    _h(' * Returns the reply of the request asked by')
-    _h(' * ')
-    _h(' * The parameter @p e supplied to this function must be NULL if')
-    _h(' * %s(). is used.', self.c_unchecked_name)
-    _h(' * Otherwise, it stores the error if any.')
-    _h(' *')
-    _h(' * The returned value must be freed by the caller using free().')
-    _h(' */')
-    _c('')
-    _hc('')
-    _hc('/*****************************************************************************')
-    _hc(' **')
-    _hc(' ** %s * %s', self.c_reply_type, self.c_reply_name)
-    _hc(' ** ')
-    _hc(' ** @param xcb_connection_t%s  *c', spacing1)
-    _hc(' ** @param %s   cookie', self.c_cookie_type)
-    _hc(' ** @param xcb_generic_error_t%s **e', spacing2)
-    _hc(' ** @returns %s *', self.c_reply_type)
-    _hc(' **')
-    _hc(' *****************************************************************************/')
-    _hc(' ')
-    _hc('%s *', self.c_reply_type)
-    _hc('%s (xcb_connection_t%s  *c  /**< */,', self.c_reply_name, spacing1)
-    _hc('%s%s   cookie  /**< */,', spacing3, self.c_cookie_type)
-    _h('%sxcb_generic_error_t%s **e  /**< */);', spacing3, spacing2)
-    _c('%sxcb_generic_error_t%s **e  /**< */)', spacing3, spacing2)
-    _c('{')
-    _c('    return (%s *) xcb_wait_for_reply(c, cookie.sequence, e);', self.c_reply_type)
-    _c('}')
-
-def _c_opcode(name, opcode):
-    '''
-    Declares the opcode define for requests, events, and errors.
-    '''
-    _h_setlevel(0)
-    _h('')
-    _h('/** Opcode for %s. */', _n(name))
-    _h('#define %s %s', _n(name).upper(), opcode)
-    
-def _c_cookie(self, name):
-    '''
-    Declares the cookie type for a non-void request.
-    '''
-    _h_setlevel(0)
-    _h('')
-    _h('/**')
-    _h(' * @brief %s', self.c_cookie_type)
-    _h(' **/')
-    _h('typedef struct %s {', self.c_cookie_type)
-    _h('    unsigned int sequence; /**<  */')
-    _h('} %s;', self.c_cookie_type)
-
-def c_request(self, name):
-    '''
-    Exported function that handles request declarations.
-    '''
-    _c_type_setup(self, name, ('request',))
-
-    if self.reply:
-        # Cookie type declaration
-        _c_cookie(self, name)
-
-    # Opcode define
-    _c_opcode(name, self.opcode)
-
-    # Request structure declaration
-    _c_complex(self)
-
-    if self.reply:
-        _c_type_setup(self.reply, name, ('reply',))
-        # Reply structure definition
-        _c_complex(self.reply)
-        # Request prototypes
-        _c_request_helper(self, name, self.c_cookie_type, False, True)
-        _c_request_helper(self, name, self.c_cookie_type, False, False)
-        # Reply accessors
-        _c_accessors(self.reply, name + ('reply',), name)
-        _c_reply(self, name)
-    else:
-        # Request prototypes
-        _c_request_helper(self, name, 'xcb_void_cookie_t', True, False)
-        _c_request_helper(self, name, 'xcb_void_cookie_t', True, True)
-
-def c_event(self, name):
-    '''
-    Exported function that handles event declarations.
-    '''
-    _c_type_setup(self, name, ('event',))
-
-    # Opcode define
-    _c_opcode(name, self.opcodes[name])
-
-    if self.name == name:
-        # Structure definition
-        _c_complex(self)
-    else:
-        # Typedef
-        _h('')
-        _h('typedef %s %s;', _t(self.name + ('event',)), _t(name + ('event',)))
-
-def c_error(self, name):
-    '''
-    Exported function that handles error declarations.
-    '''
-    _c_type_setup(self, name, ('error',))
-
-    # Opcode define
-    _c_opcode(name, self.opcodes[name])
-
-    if self.name == name:
-        # Structure definition
-        _c_complex(self)
-    else:
-        # Typedef
-        _h('')
-        _h('typedef %s %s;', _t(self.name + ('error',)), _t(name + ('error',)))
-
-
-# Main routine starts here
-
-# Must create an "output" dictionary before any xcbgen imports.
-output = {'open'    : c_open,
-          'close'   : c_close,
-          'simple'  : c_simple,
-          'enum'    : c_enum,
-          'struct'  : c_struct,
-          'union'   : c_union,
-          'request' : c_request,
-          'event'   : c_event,
-          'error'   : c_error
-          }
-
-# Boilerplate below this point
-
-# Check for the argument that specifies path to the xcbgen python package.
-try:
-    opts, args = getopt.getopt(sys.argv[1:], 'p:')
-except getopt.GetoptError, err:
-    print str(err)
-    print 'Usage: c_client.py [-p path] file.xml'
-    sys.exit(1)
-
-for (opt, arg) in opts:
-    if opt == '-p':
-        sys.path.append(arg)
-
-# Import the module class
-try:
-    from xcbgen.state import Module
-except ImportError:
-    print ''
-    print 'Failed to load the xcbgen Python package!'
-    print 'Make sure that xcb/proto installed it on your Python path.'
-    print 'If not, you will need to create a .pth file or define $PYTHONPATH'
-    print 'to extend the path.'
-    print 'Refer to the README file in xcb/proto for more info.'
-    print ''
-    raise
-
-# Parse the xml header
-module = Module(args[0], output)
-
-# Build type-registry and resolve type dependencies
-module.register()
-module.resolve()
-
-# Output the code
-module.generate()
+#!/usr/bin/env python

+from xml.etree.cElementTree import *

+from os.path import basename

+import getopt

+import sys

+import re

+

+# Jump to the bottom of this file for the main routine

+

+# Some hacks to make the API more readable, and to keep backwards compability

+_cname_re = re.compile('([A-Z0-9][a-z]+|[A-Z0-9]+(?![a-z])|[a-z]+)')

+_cname_special_cases = {'DECnet':'decnet'}

+

+_extension_special_cases = ['XPrint', 'XCMisc', 'BigRequests']

+

+_cplusplus_annoyances = {'class' : '_class',

+                         'new'   : '_new',

+                         'delete': '_delete'}

+

+_hlines = []

+_clines = []

+_level = 0

+_ns = None

+

+def _h(fmt, *args):

+    '''

+    Writes the given line to the header file.

+    '''

+    _hlines[_level].append(fmt % args)

+    

+def _c(fmt, *args):

+    '''

+    Writes the given line to the source file.

+    '''

+    _clines[_level].append(fmt % args)

+    

+def _hc(fmt, *args):

+    '''

+    Writes the given line to both the header and source files.

+    '''

+    _h(fmt, *args)

+    _c(fmt, *args)

+

+_LEVEL_HEADER = 0

+_LEVEL_TYPES = 1

+_LEVEL_FUNCTIONS = 2

+_LEVEL_FOOTER = 3

+def _set_level(lvl):

+    '''Set header target level

+    

+    Changes the array that header lines are written to using _h and _hc.

+    Supports writing different sections of the header file.

+    '''

+    # resize the target arrays for the selected level

+    while len(_hlines) <= lvl:

+        _hlines.append([])

+    while len(_clines) <= lvl:

+        _clines.append([])

+    global _level

+    _level = lvl

+

+

+def _n_item(str):

+    '''

+    Does C-name conversion on a single string fragment.

+    Uses a regexp with some hard-coded special cases.

+    '''

+    if str in _cname_special_cases:

+        return _cname_special_cases[str]

+    else:

+        split = _cname_re.finditer(str)

+        name_parts = [match.group(0) for match in split]

+        return '_'.join(name_parts)

+    

+def _cpp(str):

+    '''

+    Checks for certain C++ reserved words and fixes them.

+    '''

+    if str in _cplusplus_annoyances:

+        return _cplusplus_annoyances[str]

+    else:

+        return str

+

+def _ext(str):

+    '''

+    Does C-name conversion on an extension name.

+    Has some additional special cases on top of _n_item.

+    '''

+    if str in _extension_special_cases:

+        return _n_item(str).lower()

+    else:

+        return str.lower()

+    

+def _n(list):

+    '''

+    Does C-name conversion on a tuple of strings.

+    Different behavior depending on length of tuple, extension/not extension, etc.

+    Basically C-name converts the individual pieces, then joins with underscores.

+    '''

+    if len(list) == 1:

+        parts = list

+    elif len(list) == 2:

+        parts = [list[0], _n_item(list[1])]

+    elif _ns.is_ext:

+        parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]]

+    else:

+        parts = [list[0]] + [_n_item(i) for i in list[1:]]

+    return '_'.join(parts).lower()

+

+def _t(list):

+    '''

+    Does C-name conversion on a tuple of strings representing a type.

+    Same as _n but adds a "_t" on the end.

+    '''

+    if len(list) == 1:

+        parts = list

+    elif len(list) == 2:

+        parts = [list[0], _n_item(list[1]), 't']

+    elif _ns.is_ext:

+        parts = [list[0], _ext(list[1])] + [_n_item(i) for i in list[2:]] + ['t']

+    else:

+        parts = [list[0]] + [_n_item(i) for i in list[1:]] + ['t']

+    return '_'.join(parts).lower()

+        

+

+def c_open(self):

+    '''

+    Exported function that handles module open.

+    Opens the files and writes out the auto-generated comment, header file includes, etc.

+    '''

+    global _ns

+    _ns = self.namespace

+    _ns.c_ext_global_name = _n(_ns.prefix + ('id',))

+

+    # Build the type-name collision avoidance table used by c_enum

+    build_collision_table()

+

+    _set_level(_LEVEL_HEADER)

+

+    _hc('/**')

+    _hc(' * This file generated automatically from %s by c_client.py.', _ns.file)

+    _hc(' * Edit at your peril.')

+    _hc(' */')

+    _hc('')

+

+    _h('/**')

+    _h(' * @defgroup XCB_%s_API XCB %s API', _ns.ext_name, _ns.ext_name)

+    _h(' * @brief %s XCB Protocol Implementation.', _ns.ext_name)

+    _h(' * @{')

+    _h(' */')

+    _h('')

+    _h('#ifndef XCB_%s_H_INCLUDED', _ns.header.upper())

+    _h('#define XCB_%s_H_INCLUDED', _ns.header.upper())

+    _h('')

+    _h('#include "xcb.h"')

+

+    _c('#include <string.h>')

+    _c('#include <assert.h>')

+    _c('#include "xcbext.h"')

+    _c('#include "%s.h"', _ns.header)

+        

+    if _ns.is_ext:

+        for (n, h) in self.imports:

+            _hc('#include "%s.h"', h)

+

+    _h('')

+    _h('#ifdef __cplusplus')

+    _h('extern "C" {')

+    _h('#endif')

+

+    if _ns.is_ext:

+        _h('')

+        _h('#define XCB_%s_MAJOR_VERSION %s', _ns.ext_name.upper(), _ns.major_version)

+        _h('#define XCB_%s_MINOR_VERSION %s', _ns.ext_name.upper(), _ns.minor_version)

+        _h('  ') #XXX

+        _h('extern xcb_extension_t %s;', _ns.c_ext_global_name)

+

+        _c('')

+        _c('xcb_extension_t %s = { "%s", 0 };', _ns.c_ext_global_name, _ns.ext_xname)

+

+def c_close(self):

+    '''

+    Exported function that handles module close.

+    Writes out all the stored content lines, then closes the files.

+    '''

+    _set_level(_LEVEL_FOOTER)

+    _hc('')

+

+    _h('')

+    _h('#ifdef __cplusplus')

+    _h('}')

+    _h('#endif')

+

+    _h('')

+    _h('#endif')

+    _h('')

+    _h('/**')

+    _h(' * @}')

+    _h(' */')

+

+    # Write header file

+    hfile = open('%s.h' % _ns.header, 'w')

+    for list in _hlines:

+        for line in list:

+            hfile.write(line)

+            hfile.write('\n')

+    hfile.close()

+

+    # Write source file

+    cfile = open('%s.c' % _ns.header, 'w')

+    for list in _clines:

+        for line in list:

+            cfile.write(line)

+            cfile.write('\n')

+    cfile.close()

+

+def build_collision_table():

+    global namecount

+    namecount = {}

+

+    for v in module.types.values():

+        name = _t(v[0])

+        namecount[name] = (namecount.get(name) or 0) + 1

+

+def c_enum(self, name):

+    '''

+    Exported function that handles enum declarations.

+    '''

+

+    tname = _t(name)

+    if namecount[tname] > 1:

+        tname = _t(name + ('enum',))

+

+    _set_level(_LEVEL_TYPES)

+    _h('')

+    _h('typedef enum %s {', tname)

+

+    count = len(self.values)

+

+    for (enam, eval) in self.values:

+        count = count - 1

+        equals = ' = ' if eval != '' else ''

+        comma = ',' if count > 0 else ''

+        _h('    %s%s%s%s', _n(name + (enam,)).upper(), equals, eval, comma)

+

+    _h('} %s;', tname)

+

+def _c_type_setup(self, name, postfix):

+    '''

+    Sets up all the C-related state by adding additional data fields to

+    all Field and Type objects.  Here is where we figure out most of our

+    variable and function names.

+

+    Recurses into child fields and list member types.

+    '''

+    # Do all the various names in advance

+    self.c_type = _t(name + postfix)

+    self.c_wiretype = 'char' if self.c_type == 'void' else self.c_type

+

+    self.c_iterator_type = _t(name + ('iterator',))

+    self.c_next_name = _n(name + ('next',))

+    self.c_end_name = _n(name + ('end',))

+

+    self.c_request_name = _n(name)

+    self.c_checked_name = _n(name + ('checked',))

+    self.c_unchecked_name = _n(name + ('unchecked',))

+    self.c_reply_name = _n(name + ('reply',))

+    self.c_reply_type = _t(name + ('reply',))

+    self.c_cookie_type = _t(name + ('cookie',))

+

+    if self.is_container:

+

+        self.c_container = 'union' if self.is_union else 'struct'

+        prev_varsized_field = None

+        prev_varsized_offset = 0

+        first_field_after_varsized = None

+

+        for field in self.fields:

+            _c_type_setup(field.type, field.field_type, ())

+            if field.type.is_list:

+                _c_type_setup(field.type.member, field.field_type, ())

+

+            field.c_field_type = _t(field.field_type)

+            field.c_field_const_type = ('' if field.type.nmemb == 1 else 'const ') + field.c_field_type

+            field.c_field_name = _cpp(field.field_name)

+            field.c_subscript = '[%d]' % field.type.nmemb if (field.type.nmemb > 1) else ''

+            field.c_pointer = ' ' if field.type.nmemb == 1 else '*'

+

+            field.c_iterator_type = _t(field.field_type + ('iterator',))      # xcb_fieldtype_iterator_t

+            field.c_iterator_name = _n(name + (field.field_name, 'iterator')) # xcb_container_field_iterator

+            field.c_accessor_name = _n(name + (field.field_name,))            # xcb_container_field

+            field.c_length_name = _n(name + (field.field_name, 'length'))     # xcb_container_field_length

+            field.c_end_name = _n(name + (field.field_name, 'end'))           # xcb_container_field_end

+

+            field.prev_varsized_field = prev_varsized_field

+            field.prev_varsized_offset = prev_varsized_offset

+

+            if prev_varsized_offset == 0:

+                first_field_after_varsized = field

+            field.first_field_after_varsized = first_field_after_varsized

+

+            if field.type.fixed_size():

+                prev_varsized_offset += field.type.size

+            else:

+                self.last_varsized_field = field

+                prev_varsized_field = field

+                prev_varsized_offset = 0

+

+def _c_iterator_get_end(field, accum):

+    '''

+    Figures out what C code is needed to find the end of a variable-length structure field.

+    For nested structures, recurses into its last variable-sized field.

+    For lists, calls the end function

+    '''

+    if field.type.is_container:

+        accum = field.c_accessor_name + '(' + accum + ')'

+        # XXX there could be fixed-length fields at the end

+        return _c_iterator_get_end(field.type.last_varsized_field, accum)

+    if field.type.is_list:

+        # XXX we can always use the first way

+        if field.type.member.is_simple:

+            return field.c_end_name + '(' + accum + ')'

+        else:

+            return field.type.member.c_end_name + '(' + field.c_iterator_name + '(' + accum + '))'

+

+

+def _c_function_header(name, params, returns, brief_doc, long_doc):

+    """Generate comment header for a C function

+

+    name - name of the function

+    params - list of name/description pairs defining the parameters

+    returns - description of the return value

+    brief_doc - short description

+    long_doc - long description, can be a string or a list of strings

+    """

+    _hc('/**')

+    if brief_doc:

+        _hc(' * @brief %s', brief_doc)

+    if params or returns:

+        _hc(' *')

+        # determine the longest parameter name for alignment

+        # we start off with 2 to accomodate for the 'returns',

+        # if present

+        longest = 0

+        if returns:

+            longest = 2

+        for name, doc in params:

+            longest = max(longest, len(name))

+        for name, doc in params:

+            _hc(' * @param %s %s', name.ljust(longest), doc)

+        if returns:

+            _hc(' * @returns %s %s', ''.ljust(longest-2), returns)

+    if not long_doc:

+        pass

+    elif isinstance(long_doc, list):

+        _hc(' *')

+        for line in long_doc:

+            _hc(' * %s', line)

+    else:

+        _hc(' *')

+        _hc(' * %s', long_doc)

+    _hc(' */')

+

+

+def _c_iterator(self, name):

+    '''

+    Declares the iterator structure and next/end functions for a given type.

+    '''

+    _set_level(_LEVEL_TYPES)

+    _h('')

+    _h('/**')

+    _h(' * @brief %s', self.c_iterator_type)

+    _h(' */')

+    _h('typedef struct %s {', self.c_iterator_type)

+    _h('    %s *data;', self.c_type)

+    _h('    int%s rem;', ' ' * (len(self.c_type) - 2))

+    _h('    int%s index;', ' ' * (len(self.c_type) - 2))

+    _h('} %s;', self.c_iterator_type)

+

+    _set_level(_LEVEL_FUNCTIONS)

+    _h('')

+    _c_function_header(name=self.c_next_name,

+                       brief_doc='Get the next element of the iterator',

+                       params=[('i', 'Pointer to a %s' % self.c_iterator_type)],

+                       returns=None,

+                       long_doc=['Get the next element in the iterator. The member rem is',

+                                 'decreased by one. The member data points to the next',

+                                 'element. The member index is increased by sizeof(%s)' % self.c_type])

+    _hc('')

+    _hc('void')

+    _h('%s (%s *i);', self.c_next_name, self.c_iterator_type)

+    _c('%s (%s *i)', self.c_next_name, self.c_iterator_type)

+    _c('{')

+    if not self.fixed_size():

+        _c('    %s *R = i->data;', self.c_type)

+        _c('    xcb_generic_iterator_t child = %s;', _c_iterator_get_end(self.last_varsized_field, 'R'))

+        _c('    --i->rem;')

+        _c('    i->data = (%s *) child.data;', self.c_type)

+        _c('    i->index = child.index;')

+    else:

+        _c('    --i->rem;')

+        _c('    ++i->data;')

+        _c('    i->index += sizeof(%s);', self.c_type)

+    _c('}')

+

+    _h('')

+    _c_function_header(name=self.c_end_name,

+                       brief_doc='Return the iterator pointing to the last element',

+                       params=[('i', 'An %s' % self.c_iterator_type)],

+                       returns='The iterator pointing to the last element',

+                       long_doc=['Set the current element in the iterator to the last element.',

+                                 'The member rem is set to 0. The member data points to the',

+                                 'last element.'])

+    _hc('')

+    _hc('xcb_generic_iterator_t')

+    _h('%s (%s i);', self.c_end_name, self.c_iterator_type)

+    _c('%s (%s i)', self.c_end_name, self.c_iterator_type)

+    _c('{')

+    _c('    xcb_generic_iterator_t ret;')

+    if self.fixed_size():

+        _c('    ret.data = i.data + i.rem;')

+        _c('    ret.index = i.index + ((char *) ret.data - (char *) i.data);')

+        _c('    ret.rem = 0;')

+    else:

+        _c('    while(i.rem > 0)')

+        _c('        %s(&i);', self.c_next_name)

+        _c('    ret.data = i.data;')

+        _c('    ret.rem = i.rem;')

+        _c('    ret.index = i.index;')

+    _c('    return ret;')

+    _c('}')

+

+

+def _c_accessor_get_length(expr, prefix=''):

+    '''

+    Figures out what C code is needed to get a length field.

+    For fields that follow a variable-length field, use the accessor.

+    Otherwise, just reference the structure field directly.

+    '''

+    prefarrow = '' if prefix == '' else prefix + '->'

+

+    if expr.lenfield != None and expr.lenfield.prev_varsized_field != None:

+        return expr.lenfield.c_accessor_name + '(' + prefix + ')'

+    elif expr.lenfield_name != None:

+        return prefarrow + expr.lenfield_name

+    else:

+        return str(expr.nmemb)

+

+def _c_accessor_get_expr(expr, prefix=''):

+    '''

+    Figures out what C code is needed to get the length of a list field.

+    Recurses for math operations.

+    Returns bitcount for value-mask fields.

+    Otherwise, uses the value of the length field.

+    '''

+    lenexp = _c_accessor_get_length(expr, prefix)

+

+    if expr.op == '~':

+        return '(' + '~' + _c_accessor_get_expr(expr.rhs, prefix) + ')'

+    elif expr.op != None:

+        return '(' + _c_accessor_get_expr(expr.lhs, prefix) + ' ' + expr.op + ' ' + _c_accessor_get_expr(expr.rhs, prefix) + ')'

+    elif expr.bitfield:

+        return 'xcb_popcount(' + lenexp + ')'

+    else:

+        return lenexp

+

+def _c_accessors_field(self, field):

+    '''

+    Declares the accessor functions for a non-list field that follows a variable-length field.

+    '''

+    _hc('')

+    if field.type.is_simple:

+        # import pdb

+        # pdb.set_trace()

+        _c_function_header(name=field.c_accessor_name,

+                           brief_doc='Access %s field of a reply' % field.field_name,

+                           params=[('R', 'Pointer to the %s' % self.c_type)],

+                           returns='The value of the field',

+                           long_doc=[])

+        _hc('')

+        _hc('%s', field.c_field_type)

+        _h('%s (const %s *R);', field.c_accessor_name, self.c_type)

+        _c('%s (const %s *R)', field.c_accessor_name, self.c_type)

+        _c('{')

+        _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))

+        _c('    return * (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)

+        _c('}')

+    else:

+        import pdb

+        pdb.set_trace()

+        _c_function_header(name=field.c_accessor_name,

+                           brief_doc='Access field of a reply',

+                           params=[('R', 'Pointer to the %s' % self.c_type)],

+                           returns='A pointer to the field',

+                           long_doc=[])

+        _hc('')

+        _hc('%s *', field.c_field_type)

+        _h('%s (const %s *R);', field.c_accessor_name, self.c_type)

+        _c('%s (const %s *R)', field.c_accessor_name, self.c_type)

+        _c('{')

+        _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))

+        _c('    return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)

+        _c('}')

+    

+def _c_accessors_list(self, field):

+    '''

+    Declares the accessor functions for a list field.

+    Declares a direct-accessor function only if the list members are fixed size.

+    Declares length and get-iterator functions always.

+    '''

+    list = field.type

+

+    _set_level(_LEVEL_FUNCTIONS)

+    if list.member.fixed_size():

+        _hc('')

+        _c_function_header(name=field.c_accessor_name,

+                           brief_doc='Access list field of a reply',

+                           params=[('R', 'Pointer to the %s' % self.c_type)],

+                           returns='A pointer to the field',

+                           long_doc=[])

+        _hc('')

+        _hc('%s *', field.c_field_type)

+        _h('%s (const %s *R);', field.c_accessor_name, self.c_type)

+        _c('%s (const %s *R)', field.c_accessor_name, self.c_type)

+        _c('{')

+

+        if field.prev_varsized_field == None:

+            _c('    return (%s *) (R + 1);', field.c_field_type)

+        else:

+            _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))

+            _c('    return (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index) + %d);', field.c_field_type, field.first_field_after_varsized.type.c_type, field.prev_varsized_offset)

+

+        _c('}')

+

+    _hc('')

+    _c_function_header(name=field.c_length_name,

+                       brief_doc='Length of a list field of a reply',

+                       params=[('R', 'Pointer to the %s' % self.c_type)],

+                       returns='Length of the list',

+                       long_doc=[])

+    _hc('')

+    _hc('int')

+    _h('%s (const %s *R);', field.c_length_name, self.c_type)

+    _c('%s (const %s *R)', field.c_length_name, self.c_type)

+    _c('{')

+    _c('    return %s;', _c_accessor_get_expr(field.type.expr, 'R'))

+    _c('}')

+

+    if field.type.member.is_simple:

+        _hc('')

+        _c_function_header(name=field.c_end_name,

+                           brief_doc='Return the iterator pointing to the last element of a list field',

+                           params=[('R', 'Pointer to the %s' % self.c_type)],

+                           returns='A generic iterator to the field',

+                           long_doc=[])

+        _hc('')

+        _hc('xcb_generic_iterator_t')

+        _h('%s (const %s *R);', field.c_end_name, self.c_type)

+        _c('%s (const %s *R)', field.c_end_name, self.c_type)

+        _c('{')

+        _c('    xcb_generic_iterator_t i;')

+

+        if field.prev_varsized_field == None:

+            _c('    i.data = ((%s *) (R + 1)) + (%s);', field.type.c_wiretype, _c_accessor_get_expr(field.type.expr, 'R'))

+        else:

+            _c('    xcb_generic_iterator_t child = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))

+            _c('    i.data = ((%s *) child.data) + (%s);', field.type.c_wiretype, _c_accessor_get_expr(field.type.expr, 'R'))

+

+        _c('    i.rem = 0;')

+        _c('    i.index = (char *) i.data - (char *) R;')

+        _c('    return i;')

+        _c('}')

+

+    else:

+        _hc('')

+        _c_function_header(name=field.c_iterator_name,

+                           brief_doc='Return an iterator for a list field',

+                           params=[('R', 'Pointer to the %s' % self.c_type)],

+                           returns='A iterator for the list field',

+                           long_doc=[])

+        _hc('')

+        _hc('%s', field.c_iterator_type)

+        _h('%s (const %s *R);', field.c_iterator_name, self.c_type)

+        _c('%s (const %s *R)', field.c_iterator_name, self.c_type)

+        _c('{')

+        _c('    %s i;', field.c_iterator_type)

+

+        if field.prev_varsized_field == None:

+            _c('    i.data = (%s *) (R + 1);', field.c_field_type)

+        else:

+            _c('    xcb_generic_iterator_t prev = %s;', _c_iterator_get_end(field.prev_varsized_field, 'R'))

+            _c('    i.data = (%s *) ((char *) prev.data + XCB_TYPE_PAD(%s, prev.index));', field.c_field_type, field.c_field_type)

+

+        _c('    i.rem = %s;', _c_accessor_get_expr(field.type.expr, 'R'))

+        _c('    i.index = (char *) i.data - (char *) R;')

+        _c('    return i;')

+        _c('}')

+

+def _c_accessors(self, name, base):

+    '''

+    Declares the accessor functions for the fields of a structure.

+    '''

+    for field in self.fields:

+        if field.type.is_list and not field.type.fixed_size():

+            _c_accessors_list(self, field)

+        elif field.prev_varsized_field != None:

+            _c_accessors_field(self, field)

+

+def c_simple(self, name):

+    '''

+    Exported function that handles cardinal type declarations.

+    These are types which are typedef'd to one of the CARDx's, char, float, etc.

+    '''

+    _c_type_setup(self, name, ())

+

+    if (self.name != name):

+        # Typedef

+        _set_level(_LEVEL_TYPES)

+        my_name = _t(name)

+        _h('')

+        _h('typedef %s %s;', _t(self.name), my_name)

+

+        # Iterator

+        _c_iterator(self, name)

+

+def _c_complex(self):

+    '''

+    Helper function for handling all structure types.

+    Called for all structs, requests, replies, events, errors.

+    '''

+    _set_level(_LEVEL_TYPES)

+    _h('')

+    _h('/**')

+    _h(' * @brief %s', self.c_type)

+    _h(' */')

+    _h('typedef %s %s {', self.c_container, self.c_type)

+

+    struct_fields = []

+    maxtypelen = 0

+

+    varfield = None

+    for field in self.fields:

+        if not field.type.fixed_size():

+            varfield = field.c_field_name

+            continue

+        if varfield != None and not field.type.is_pad and field.wire:

+            errmsg = '%s: warning: variable field %s followed by fixed field %s\n' % (self.c_type, varfield, field.c_field_name)

+            sys.stderr.write(errmsg)

+            # sys.exit(1)

+        if field.wire:

+            struct_fields.append(field)

+        

+    for field in struct_fields:

+        if len(field.c_field_type) > maxtypelen:

+            maxtypelen = len(field.c_field_type)

+

+    for field in struct_fields:

+        spacing = ' ' * (maxtypelen - len(field.c_field_type))

+        _h('    %s%s %s%s;', field.c_field_type, spacing, field.c_field_name, field.c_subscript)

+

+    _h('} %s;', self.c_type)

+

+def c_struct(self, name):

+    '''

+    Exported function that handles structure declarations.

+    '''

+    _c_type_setup(self, name, ())

+    _c_complex(self)

+    _c_accessors(self, name, name)

+    _c_iterator(self, name)

+

+def c_union(self, name):

+    '''

+    Exported function that handles union declarations.

+    '''

+    _c_type_setup(self, name, ())

+    _c_complex(self)

+    _c_iterator(self, name)

+

+def _c_request_helper(self, name, cookie_type, void, regular):

+    '''

+    Declares a request function.

+    '''

+

+    # Four stunningly confusing possibilities here:

+    #

+    #   Void            Non-void

+    # ------------------------------

+    # "req"            "req"

+    # 0 flag           CHECKED flag   Normal Mode

+    # void_cookie      req_cookie

+    # ------------------------------

+    # "req_checked"    "req_unchecked"

+    # CHECKED flag     0 flag         Abnormal Mode

+    # void_cookie      req_cookie

+    # ------------------------------

+

+

+    # Whether we are _checked or _unchecked

+    checked = void and not regular

+    unchecked = not void and not regular

+

+    # What kind of cookie we return

+    func_cookie = 'xcb_void_cookie_t' if void else self.c_cookie_type

+

+    # What flag is passed to xcb_request

+    func_flags = '0' if (void and regular) or (not void and not regular) else 'XCB_REQUEST_CHECKED'

+

+    # Global extension id variable or NULL for xproto

+    func_ext_global = '&' + _ns.c_ext_global_name if _ns.is_ext else '0'

+

+    # What our function name is

+    func_name = self.c_request_name

+    if checked:

+        func_name = self.c_checked_name

+    if unchecked:

+        func_name = self.c_unchecked_name

+

+    param_fields = []

+    wire_fields = []

+    maxtypelen = len('xcb_connection_t')

+

+    for field in self.fields:

+        if field.visible:

+            # The field should appear as a call parameter

+            param_fields.append(field)

+        if field.wire and not field.auto:

+            # We need to set the field up in the structure

+            wire_fields.append(field)

+        

+    for field in param_fields:

+        if len(field.c_field_const_type) > maxtypelen:

+            maxtypelen = len(field.c_field_const_type)

+

+    _set_level(_LEVEL_FUNCTIONS)

+    _h('')

+

+    long_doc = []

+    if checked:

+        long_doc += ['This form can be used only if the request will not cause',

+                     'a reply to be generated. Any returned error will be',

+                     'saved for handling by xcb_request_check().']

+    if unchecked:

+        long_doc += ['This form can be used only if the request will cause',

+                     'a reply to be generated. Any returned error will be',

+                     'placed in the event queue.']

+    params = [('c', 'Connection to X server')]

+    for field in param_fields:

+        # TODO: This just uses the type of the parameter for lack of documentation.

+        params.append((field.c_field_name, field.c_field_const_type))

+

+    _c_function_header(name=func_name,

+                       brief_doc='Deliver a request to the X server',

+                       params=params,

+                       returns='Cookie for the request',

+                       long_doc=long_doc)

+    _hc('')

+    _hc('%s', cookie_type)

+

+    spacing = ' ' * (maxtypelen - len('xcb_connection_t'))

+    comma = ',' if len(param_fields) else ');'

+    _h('%s (xcb_connection_t%s *c%s', func_name, spacing, comma)

+    comma = ',' if len(param_fields) else ')'

+    _c('%s (xcb_connection_t%s *c%s', func_name, spacing, comma)

+

+    func_spacing = ' ' * (len(func_name) + 2)

+    count = len(param_fields)

+    for field in param_fields:

+        count = count - 1

+        spacing = ' ' * (maxtypelen - len(field.c_field_const_type))

+        comma = ',' if count else ');'

+        _h('%s%s%s %s%s%s', func_spacing, field.c_field_const_type, spacing, field.c_pointer, field.c_field_name, comma)

+        comma = ',' if count else ')'

+        _c('%s%s%s %s%s%s', func_spacing, field.c_field_const_type, spacing, field.c_pointer, field.c_field_name, comma)

+

+    count = 2

+    for field in param_fields:

+        if not field.type.fixed_size():

+            count = count + 2

+

+    _c('{')

+    _c('    static const xcb_protocol_request_t xcb_req = {')

+    _c('        /* count */ %d,', count)

+    _c('        /* ext */ %s,', func_ext_global)

+    _c('        /* opcode */ %s,', self.c_request_name.upper())

+    _c('        /* isvoid */ %d', 1 if void else 0)

+    _c('    };')

+    _c('    ')

+    _c('    struct iovec xcb_parts[%d];', count + 2)

+    _c('    %s xcb_ret;', func_cookie)

+    _c('    %s xcb_out;', self.c_type)

+    _c('    ')

+

+    for field in wire_fields:

+        if field.type.fixed_size():

+            if field.type.is_expr:

+                _c('    xcb_out.%s = %s;', field.c_field_name, _c_accessor_get_expr(field.type.expr))

+

+            elif field.type.is_pad:

+                if field.type.nmemb == 1:

+                    _c('    xcb_out.%s = 0;', field.c_field_name)

+                else:

+                    _c('    memset(xcb_out.%s, 0, %d);', field.c_field_name, field.type.nmemb)

+            else:

+                if field.type.nmemb == 1:

+                    _c('    xcb_out.%s = %s;', field.c_field_name, field.c_field_name)

+                else:

+                    _c('    memcpy(xcb_out.%s, %s, %d);', field.c_field_name, field.c_field_name, field.type.nmemb)

+

+    _c('    ')

+    _c('    xcb_parts[2].iov_base = (char *) &xcb_out;')

+    _c('    xcb_parts[2].iov_len = sizeof(xcb_out);')

+    _c('    xcb_parts[3].iov_base = 0;')

+    _c('    xcb_parts[3].iov_len = -xcb_parts[2].iov_len & 3;')

+

+    count = 4

+    for field in param_fields:

+        if not field.type.fixed_size():

+            _c('    xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)

+            if field.type.is_list:

+                _c('    xcb_parts[%d].iov_len = %s * sizeof(%s);', count, _c_accessor_get_expr(field.type.expr), field.type.member.c_wiretype)

+            else:

+                _c('    xcb_parts[%d].iov_len = %s * sizeof(%s);', count, 'Uh oh', field.type.c_wiretype)

+            _c('    xcb_parts[%d].iov_base = 0;', count + 1)

+            _c('    xcb_parts[%d].iov_len = -xcb_parts[%d].iov_len & 3;', count + 1, count)

+            count = count + 2

+

+    _c('    xcb_ret.sequence = xcb_send_request(c, %s, xcb_parts + 2, &xcb_req);', func_flags)

+    _c('    return xcb_ret;')

+    _c('}')

+

+def _c_reply(self, name):

+    '''

+    Declares the function that returns the reply structure.

+    '''

+    spacing1 = ' ' * (len(self.c_cookie_type) - len('xcb_connection_t'))

+    spacing2 = ' ' * (len(self.c_cookie_type) - len('xcb_generic_error_t'))

+    spacing3 = ' ' * (len(self.c_reply_name) + 2)

+

+    _h('')

+

+    _c_function_header(name=self.c_reply_name,

+                       brief_doc='Retrieve a reply from the X server',

+                       params=[('c', 'Connection to X server'),

+                               ('cookie', 'Cookie for the request'),

+                               ('e', 'Address of xcb_generic_error pointer')],

+                       returns='Reply for the request',

+                       long_doc=['Returns the reply to the request asked by %s' % self.c_checked_name,

+                                 'or %s.' % self.c_unchecked_name,

+                                 '',

+                                 'The parameter @p e supplied to this function must be NULL if',

+                                 '%s() is used.' % self.c_unchecked_name,

+                                 'Otherwise, it stores the error if any.',

+                                 '',

+                                 'Both the returned reply, or optionally *e, must be freed',

+                                 'by the caller using free().'])

+

+    _hc('')

+    _hc('%s *', self.c_reply_type)

+    _hc('%s (xcb_connection_t%s  *c,', self.c_reply_name, spacing1)

+    _hc('%s%s   cookie,', spacing3, self.c_cookie_type)

+    _h('%sxcb_generic_error_t%s **e);', spacing3, spacing2)

+    _c('%sxcb_generic_error_t%s **e)', spacing3, spacing2)

+    _c('{')

+    _c('    return (%s *) xcb_wait_for_reply(c, cookie.sequence, e);', self.c_reply_type)

+    _c('}')

+

+def _c_opcode(name, opcode):

+    '''

+    Declares the opcode define for requests, events, and errors.

+    '''

+    _set_level(_LEVEL_TYPES)

+    _h('')

+    _h('/** Opcode for %s. */', _n(name))

+    _h('#define %s %s', _n(name).upper(), opcode)

+    

+def _c_cookie(self, name):

+    '''

+    Declares the cookie type for a non-void request.

+    '''

+    _set_level(_LEVEL_TYPES)

+    _h('')

+    _h('/**')

+    _h(' * @brief %s', self.c_cookie_type)

+    _h(' */')

+    _h('typedef struct %s {', self.c_cookie_type)

+    _h('    unsigned int sequence;')

+    _h('} %s;', self.c_cookie_type)

+

+def c_request(self, name):

+    '''

+    Exported function that handles request declarations.

+    '''

+    _c_type_setup(self, name, ('request',))

+

+    if self.reply:

+        # Cookie type declaration

+        _c_cookie(self, name)

+

+    # Opcode define

+    _c_opcode(name, self.opcode)

+

+    # Request structure declaration

+    _c_complex(self)

+

+    if self.reply:

+        _c_type_setup(self.reply, name, ('reply',))

+        # Reply structure definition

+        _c_complex(self.reply)

+        # Request prototypes

+        _c_request_helper(self, name, self.c_cookie_type, False, True)

+        _c_request_helper(self, name, self.c_cookie_type, False, False)

+        # Reply accessors

+        _c_accessors(self.reply, name + ('reply',), name)

+        _c_reply(self, name)

+    else:

+        # Request prototypes

+        _c_request_helper(self, name, 'xcb_void_cookie_t', True, False)

+        _c_request_helper(self, name, 'xcb_void_cookie_t', True, True)

+

+def c_event(self, name):

+    '''

+    Exported function that handles event declarations.

+    '''

+    _c_type_setup(self, name, ('event',))

+

+    # Opcode define

+    _c_opcode(name, self.opcodes[name])

+

+    if self.name == name:

+        # Structure definition

+        _c_complex(self)

+    else:

+        # Typedef

+        _h('')

+        _h('typedef %s %s;', _t(self.name + ('event',)), _t(name + ('event',)))

+

+def c_error(self, name):

+    '''

+    Exported function that handles error declarations.

+    '''

+    _c_type_setup(self, name, ('error',))

+

+    # Opcode define

+    _c_opcode(name, self.opcodes[name])

+

+    if self.name == name:

+        # Structure definition

+        _c_complex(self)

+    else:

+        # Typedef

+        _h('')

+        _h('typedef %s %s;', _t(self.name + ('error',)), _t(name + ('error',)))

+

+

+# Main routine starts here

+

+# Must create an "output" dictionary before any xcbgen imports.

+output = {'open'    : c_open,

+          'close'   : c_close,

+          'simple'  : c_simple,

+          'enum'    : c_enum,

+          'struct'  : c_struct,

+          'union'   : c_union,

+          'request' : c_request,

+          'event'   : c_event,

+          'error'   : c_error

+          }

+

+# Boilerplate below this point

+

+# Check for the argument that specifies path to the xcbgen python package.

+try:

+    opts, args = getopt.getopt(sys.argv[1:], 'p:')

+except getopt.GetoptError, err:

+    print str(err)

+    print 'Usage: c_client.py [-p path] file.xml'

+    sys.exit(1)

+

+for (opt, arg) in opts:

+    if opt == '-p':

+        sys.path.append(arg)

+

+# Import the module class

+try:

+    from xcbgen.state import Module

+except ImportError:

+    print ''

+    print 'Failed to load the xcbgen Python package!'

+    print 'Make sure that xcb/proto installed it on your Python path.'

+    print 'If not, you will need to create a .pth file or define $PYTHONPATH'

+    print 'to extend the path.'

+    print 'Refer to the README file in xcb/proto for more info.'

+    print ''

+    raise

+

+# Parse the xml header

+module = Module(args[0], output)

+

+# Build type-registry and resolve type dependencies

+module.register()

+module.resolve()

+

+# Output the code

+module.generate()